JPS6099740A - Roll-in device for easily assembled seat-belt - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates generally to seat belt retraction devices for use in safety restraint systems. More specifically, the present invention relates to a seat heald retraction device that is easy to assemble and disassemble.

- (Prior Art) and (Problem to be Solved by the Invention) A wide variety of seat heald retraction devices are widely used in safety restraint systems.

Seat belt retractors generally include a housing or framework, a belt storage spool rotatably attached to the retractor frame, and a biasing spring or other biasing device to cause the retracting rotation of the heald storage spool. , and some type of pawl or control mechanism to secure the heald storage spool and prevent further extension of the heald when the seat belt is pulled out around the passenger into the desired position.

The storage spool has bell 1-friction protection discs attached to each end of the spool, these discs guide the belt as the spool rotates and prevent the belt from rubbing against the frame of the entrainment device. . The normal assembly procedure for such a winding device is to first attach the sea belt to the spool and wind it around the spool.

The spool is then inserted into the frame of the retracting device and removed for rotation, for example by immersing a rotating shaft passing through the frame and the spool. It is undesirable to use a rotary shaft and a spool separately, since this increases the number of parts required for the winding device. Furthermore, since only the spool is attached to the frame by the rotating shaft, the structural weight and structural strength of the spool become a problem. Accordingly, it would be desirable to provide a method of assembling a belt spool with a belt friction protection disc that does not require separate mounting of the spool and take-up shaft.

After attaching the heald spool to the retractor frame,
Incorporating and attaching other auxiliary retractor mechanisms and components to the retractor frame. This assembly procedure is generally complex and expensive. It would be desirable to provide a simple belt retractor mechanism that allows the retractor to be installed at low cost and that allows the retractor to be easily disassembled for inspection and repair.

SUMMARY OF THE INVENTION The present invention relates to a method for quickly and easily assembling a sheet vent winding device.

A seat belt retractor is also disclosed that has many desirable features and is particularly suited for easy assembly in accordance with the present invention.

The invention is based on a method of assembling a safety belt retractor, which has a retractor frame with a bottom surface and left and right side walls. The inner surfaces of the left and right side walls face each other, and each wall has an opening through which the belt storage spool shaft passes. There is a left-hand heald friction protection disc and a right-hand heald friction protection disc, each with an opening in the center of 11 for passing a transverse shaft. The left and right friction protection discs are
They are arranged adjacent to the inner surfaces of the walls of the left and right frames, respectively, so that the opening of the disk, which does not pass through the axis, and the opening, which does not pass through the axis, of the wall of the frame of the winding device, are aligned in a straight line in the axial direction. The belt storage spool shaft is then inserted into the receiving opening and rotatably attached to the frame. Next, the belt friction protection disc is secured to the heald storage spool shaft at a spaced position adjacent to the wall of the frame.

The assembly method according to the invention improves on previous assembly techniques as it allows the fabrication or assembly of the heald storage spool and the insertion and attachment of the spool into the frame of the winding device to be carried out simultaneously.

Another feature of the invention is that the shaft receiving opening in the left side wall is smaller than the shaft receiving opening in the right side wall. The left end of the belt storage spool shaft is reduced in size so that a relatively small bearing in the left side wall fits into the opening. This creates a shoulder on the heald storage spool shaft that contacts the left side wall and defines the position of the heald storage spool shaft.

Additionally, a retaining ring or other stop is mounted on the heald storage spool shaft adjacent the inner surface of the right side wall to prevent lateral movement of the shaft toward the right side wall.

One of the other features of the invention is that the right end of the heald storage spool shaft extends outside the frame of the winding device and can be used with various devices, such as a pawl used to control the winding and unwinding of belts. It is possible to attach a small disc and an IW disc removal plate. By mounting the pawl disc and the release disc together with other auxiliary retractor parts on the outside of the retractor frame, assembly of the retractor is simplified. This is an improvement to the retractor frame in which the ratchet wheel and associated activation and release mechanisms are located between the frame wall of the retractor frame and the belt storage spool.

A further feature of this invention is that the heald storage spool shaft is
It is a two-part shaft with a lightweight plastic part on the outside and a high-strength metal support plate on the inside. The support plate can be inserted into a longitudinal slot provided in the plastic part of the shaft.

Additionally, an improved method for attaching the ratchet wheel to the support plate of the shaft is also disclosed.

Embodiment A first exemplary embodiment of the invention is shown in the exploded perspective view of FIG. The safety belt retracting device has a retracting device frame IO. The engulfer frame 10 has a bottom 12, a left side wall 14, and a right side wall 16. The left side wall has an inner surface 18 and an outer surface 20. Right side wall 16 has an inner surface 22 and an outer surface 24. The bottom portion 12 of the retraction device frame has a mounting hole 26 for fixing the retraction device frame 10 to a vehicle.
There is one provision. Left and right side walls 14 of the winding device frame
and 16 have openings 28 and 3 for receiving the belt shaft.
0 is the default.

The openings 28 and 3o for receiving the belt shaft are entirely 32
It is sized to fit the storage spool shaft shown. The means for rotatably mounting the belt storage spool shaft 32 within the belt shaft receiving openings 28 and 3o are bushings or bearings 34 and 36.

The belt storage spool shaft 32 has a left end portion 38 and a middle portion 40.
, and a right end portion 42. Belt storage spool shaft 32
It also has a lateral passageway 44 large enough to accommodate a safety heald 46. Left end of storage spool shaft 3
8 is smaller in diameter than the intermediate portion 40 of the belt storage spool shaft.

Accordingly, the shoulder portion 48 is between the left end 38 and the intermediate portion 40 of the belt storage spool shaft 32.

The heald friction protection disc 50 on the left and the belt friction protection disc 52 on the right are provided to determine the position of the seat belt during unwinding and winding. Furthermore,
Belt rub protection discs 50 and 52 prevent the heald from rubbing against the left side wall 14 and right side wall 16 of the retractor frame. The left and right belt friction protection discs 50 and 52 have central openings 54 and 56, respectively, for receiving the heald storage spool shaft.

(Safety Bell) To assemble the S-loading device, place the left-hand heald friction protection disc adjacent to the left-hand wall, and open the opening 54 in the left-hand heald friction protection disc and the opening in the left-hand wall. It is necessary to line up 28 in a straight line. The right-hand belt friction protection disc is located adjacent to the inner surface 22 of the right-hand wall and is located in the receiving opening 56 of the right-hand belt friction protection disc.
and the right bell 1-bearing are aligned with the opening 30. The belt storage spool shaft 32 is then inserted into the heald storage spool shaft receiving openings 28, 54, 56 and 30.
Insert into.

The means for fixing the heald friction protection disc to the belt storage spool shaft 32 are circular collars 58 and 60. Collars 58 and 60 are preferably integral with left and right belt friction protection discs 50 and 52. Collars 58 and 60 are preferably press fit, bent at the ends, or otherwise securely attached to belt storage spool shaft 32.

The positioning of the belt storage spool shaft 32 within the retractor frame 10 is such that the shoulder portion 48 of the shaft rests against the hair ring or bushing 34 and the belt storage spool shaft 32 is positioned toward or through the left side wall 14 further. prevent it from moving.

The position of the heald storage spool shaft 32 within the winding device frame 10 is further determined by a retaining ring 62 and a groove 64 provided in the heald storage spool shaft 32. Belt storage spool shaft 3
2 is inserted into position, the retaining ring 62 is placed in position in the groove 64 near the hair ring or bushing 36 of the right bearing, and the bell 1-storage spool shaft 32 is reeled in to secure it within the device frame 10. position.

After the belt storage spool shaft 32 and associated belt friction protection discs 50 and 52 have been assembled and mounted within the retractor frame 10, the other elements of the seat bell 1-S retractor can be assembled. The means for deflecting the heald storage spool shaft in the direction of belt winding is a rewind spring assembly generally designated 66. The rewind spring terra assembly 66 consists of a spring housing 68 and a spring 70. Using fasteners 72, the mounting secures the housing to the left side wall 14 of the rolling equipment frame by means of a fire 74. The left end 38 of the heald storage spool shaft has an elongated hole 76 into which one end 78 of the spring 70 is inserted.
A spring 70 is coupled to the belt storage spool shaft 32, and the belt storage spool shaft is deflected by the spring in the unwinding direction.

The ratchet wheel device is activated to prevent the safety bell l- from being extended when the safety heald is in a selected position between the retracted position and the fully extended position.
0 and a lock bar 82. The locking bar 82 has a ratchet engaging tab 84 located on the outside of the retractor frame 10. A locking bar 82 is mounted in an elongated hole 86 in the right side wall 16, which allows the ratchet wheel to move at a position where the ratchet engaging tab 84 does not engage with the ratchet pawl 88. be large enough to allow movement between the

The means for attaching the ratchet wheel 80 to the belt storage spool shaft is preferably to provide the ratchet wheel with a rectangular or square opening 90 that fits snugly into a rectangular or square portion 92 of the heald storage spool shaft 32--. Other fits between the ratchet opening and the shaft portion can be used as long as the ratchet wheel 80 and belt storage spool shaft 32 are shaped to allow only common rotation.

The means for actuating the lock bar 82 to engage and disengage the pawl 88 is provided by a release disc 94 and a heald sensor bar 96.

As the safety belt 46 is wound onto the belt storage spool shaft 32, the combined diameter of the shaft and the wrapped belt continues to increase until substantially the entire seat belt has been wound around the shaft. increases to belt sensor
The bar 96 is disposed near the heald storage spool shaft 32 so that when the sheet heald to be wound is stored to a certain position, the bar 96 gradually moves the lock bar 82 from a position where it can engage the pawl 88. Try to keep them apart. As a result, safely, the root 46 is completely held in the heald storage spool shaft 3.
2, the lock bar 82 is moved out of engagement with the ratchet wheel by the action of the belt sensor bar 96. When the heald is withdrawn, the lock bar 82 is fitted with a biasing spring (not shown) that gradually moves the lock bar into a position where it engages the pawl 88 of the ratchet wheel.
is pushed inward by The release disc 94 locks and locks until the heald is extended to the desired position around the passenger.
This is to prevent the bar 82 from interlocking with the ratchet wheel 80.

The release disc 94 is rotatably attached to the belt storage spool shaft 32 using a stud 98 . The release disc 94 uses the clutch spring 100 to release the ratchet wheel 8.
Deflect it so as to push it towards 0. clutch spring 100
is held in place using a retaining clip 102. As the ratchet wheel 88 rotates in the direction not shown by arrow 104 to unwind the belt, the release cam 106 rotates into contact with the ratchet engaging tab 84 and moves the ratchet engaging tab 84 away from the pawl 88. Make sure that it does not engage with the hook or claw 88. When unrolling a fully wound seat belt, belt sensor bar 96 and release cam 106 work together to release pawl engagement tab 84.
Make sure it does not come into contact with the claw 88. As the heald extends, the wrapped portion of the belt moves away from the Bell I...sensor bar 96 and causes the release cam 106 to hold the claw wheel engaging tab 84 away from the pawl 88. When the belt is in place around the passenger and a slight unwinding occurs, the release cam 106 is pulled 1111 away from the pawl engagement tab 84 so that the ratchet engagement tab 84 and one of the pawls 88 engage. to prevent the seat belt from stretching further. Pawl wheel engaging tab 84
The movement of release cam 106 away from is controlled by tuff 108 and slot 110.

゛ The pawl wheel engaging tab 84 allows the belt sensor bar 96 to contact the wrapped portion of the seat heald and engage the locking bar 82 and the pawl wheel engaging tab 84 while the seat belt is being unwound. It remains in contact with the ratchet wheel 80 until it is separated from the car 80. The shape of the pawl 88 is such that while the pawl engagement tab 84 passes over the pawl 88,
The ratchet wheel 80 allows the bell 1- to unwind, however, the ratchet engagement tab 84
Any belt payout or withdrawal is prevented until the pawl 88 is released. Pawl wheel engagement tough 8
4 is removed from its blocking position by the belt sensor bar 96, subsequent extension of the seat belt causes the release cam 106 to rotate back to its blocking position and into the desired position as previously described. It is possible to pull out the safety belt 46. The hanging 112 is the ratchet wheel 8.
0 and a release disc 94 are housed therein. Preferably, the hanging 112 is secured to the hole 116 using a stop 114.

Although any number of methods may be used to secure the safety belt 46 to the heald storage spool shaft 32, the safety belt 46 includes a loop 118 into which a sturdy belt bar 120 can be inserted.
It is desirable to form a Seat belt attachment using the support 118 and heald bar 120 is best shown in FIG.

A second embodiment of this invention is shown in FIG.

The retractor frame 10 and associated parts are the same as the retractor of FIG.
The difference is that it has improved means for attaching it to the 2. The ratchet wheel 122 has an opening 124 with a radial transverse hole 126 in the opening. The catch collar 128 is securely attached to the belt storage spool shaft 32 by a press fit or other method. For attachment, the collar 128 has tabs 130 that fit into elongated horizontal holes 126 provided in the ratchet wheel 122 to fix the ratchet wheel 122 to the heald storage spool shaft 32. This configuration connects the ratchet wheel 122 structurally and firmly to the belt storage spool shaft 32 in a desirable manner, and securely and structurally fixes the ratchet wheel 122 to the belt storage spool shaft 32 under optimum conditions.

Other preferred alternative embodiments of the invention are shown in FIGS.
9 and 10.

The reeling device is essentially the same as the reeling device shown in FIG. 1, except that it uses a different preferred belt storage spool shaft. As most clearly shown in FIG. 7, the preferred safety belt retractor of this alternative embodiment has a frame generally designated 200.

This frame includes a left side wall 202, a bottom 204 and a right side wall 20.
Has 6. The frame 200 is basically the same as the winder frame 10 and includes a rewinding deflection spring 208 . Also included is a lock bar 210 and a belt sensor bar 211.

Belt storage spool shaft 212 is preferably made of lightweight plastic or metal material. The lightweight shaft has a left end 214 and a right end 216. Furthermore, the lightweight shaft is provided with a longitudinal groove 218 into which a sturdy support plate, such as a metal plate 220, can be inserted. Metal plate 220 and heald storage spool shaft 21
Both are provided with transverse passages 222 and 224, respectively, for passage of seat bells I and 226. The metal plate 220 has shoulder portions 228 and 230 that project from the lightweight belt storage spool axis 212 at 232. These shoulder parts are ratchet wheel 23
6 and securely connects the ratchet wheel 236 to the lightweight belt storage spool shaft 212. The remainder of the seat belt terra assembly, including the release disc 238, clutch spring 240 and retaining clip 242, remains the same and functions as the retraction device described in FIG. 1.

The means for attaching the seat belt 226 to the preferred retraction device shown in FIG. 7 includes a rigid support plate 244 inserted into a loop 246 of the belt. The sturdy support plate 244 is
As shown most clearly in FIG. 10, it is shaped to fit snugly into a belt opening 222 provided in a metal plate 220.

Yet another alternative embodiment is shown in FIGS.
As shown in the figure. The lightweight heald storage spool shaft 248, which is not shown in FIG. The sturdy support plate 252 is provided with shoulder tabs 254 and 256, and these tabs have slotted holes 258 and 2 in the ratchet wheel 262.
Get stuck in 60. Additionally, one or more compressible tabs, such as tabs 264, may be provided on the lightweight bell 1-storage spool shaft 248 to replace the retaining ring 62 used in the previously described embodiments. Hold firmly within the frame of the retractor. The remainder of the alternative engulfer embodiment shown in FIG. 11 is the same as that of the engulfer shown in FIGS. 7-10.

Having described the embodiments of this invention as above, those skilled in the art will appreciate that the disclosure herein is exemplary only and that various other substitutions, adaptations and modifications can be made within the scope of this invention. You need to be aware of that. Therefore, the invention is not limited to the particular embodiments described herein.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a first preferred embodiment of the seat belt retracting device according to the present invention, and FIG.
3 is an enlarged sectional view of the right side of FIG. 2;
Figure 4 is a cross-sectional view of Figure 2 along the IV-X plane;
6 is a sectional view of the right-hand portion of the winding device shown in FIG. 5 after assembly, and FIG. 7 is a partial exploded perspective view of a second preferred embodiment of the present invention. FIG. An exploded perspective view of the preferred embodiment, FIG. 8 is a sectional view of the cutting device after assembly shown in FIG. 7, and FIG.
10 is a sectional view of the right side of the winding device shown in the figure, FIG. 10 is a sectional view of FIG.
FIG. 12 is a cross-sectional view of the right-hand portion of the engulfing device shown in FIG. 11; 10... Winding device frame, ]2... Bottom, 14...
・Left side wall 16...Right side wall, 18...Inner surface, 20...
・Outer surface, 22...Inner surface 24...Outer surface, 26...Take-out hole, 28.30...Opening 32...Belt storage spool shaft, 34.36...Bush or hair Ring, 38...left αI? 1st part, 40...middle part,
42... Right end portion, 44... Passage, 46... Safety belt, 48... Shoulder portion, 50.52... Belt friction protection disc, 54.56... Opening, 58. 60...
Collar, 62... Retaining ring, 64... Groove, 66...
Rewinding spring assembly, 68...housing,
70... Spring, 72... Stopper, 74... Mounting hole, 76... Elongated hole, 80... Rattle wheel, 82...
・o Tsuku bar, 84... Pawl wheel engagement tab, 8
6... Elongated hole, 88... Pawl, 90... Opening,
94... Release disk, 96... Belt sensor bar, 98... Studded bolt, 100... Clutch spring, 102... Holding clip, 106... Release cam, 108...・Tab, 110...Elongated hole, 112
...Housing, 114...Stopper, 116...
Hole, 11th... Ring, 120... Heald bar, 12
2... Pawl wheel, 124... Opening, 126... Side hole, 128... Mounting collar, 130... Tab, 200... Frame, 202... Left side wall, 204...・
Bottom part, 206... Right side wall, 208... Deflection spring for rewinding, 210... Lock bar, 211... Belt sensor bar, 212... Heald storage spool shaft, 214...・Left end, 216...Right end, 2
18... Groove, 220... Metal plate, 222, 224.
...Aisle, 226...Seat belt, 228,230
... Shoulder part, 234 ... Elongated hole, 236 ... Rattle wheel, 238 ... Release disk, 240 ... Clutch spring, 242 ... Holding clip, 244 ... Support plate,
246...ring, 248...heald storage spool shaft,
250... Elongated hole, 252... Support plate, 2543.
256...shoulder tab, 258,260...elongated hole, 2
62... Pawl wheel, 264... Tab.

Claims (9)

[Claims] (1) A winding device frame having a bottom and left and right side walls, the side walls having inner and outer surfaces facing each other, and each side wall having a belt storage spool! 11t with an opening for receiving a belt storage spool shaft for rotatably mounting the belt storage spool shaft, and a belt storage spool shaft.
The belt storage spool shaft has a left end portion, a middle portion, and a right end portion, and the belt storage spool shaft has a sufficient length, and when the belt storage spool shaft is rotatably attached to the winding device frame, The left and right end portions of the belt storage spool shaft pass through openings provided in the left and right side walls to receive the heald storage spool shaft, respectively, so that both ends of the belt storage spool shaft exit the retracting device frame, and the belt storage spool means for rotatably mounting the shaft within an opening for receiving the belt storage spool shaft provided on the side wall of the frame of the winding device; and an opening in the center of the left belt friction protection disc for receiving the heald storage spool shaft. and means for attaching the left belt friction protection disc to the heald storage spool shaft near the inner surface of the left side wall, and an opening in the center of the right belt friction protection disc for receiving the storage spool shaft. and means for attaching the right belt friction protection disc to the belt storage spool shaft near the inner surface of the right side wall, and a safety belt; With the means for attaching, the safety bell 1- is in a retracted position in which the safety bells 1 to 1 are wound around the storage spool shaft, and in a state in which the safety heald is unwound from the heald storage spool shaft. and means associated with the left eliii portion of the heald storage spool shaft; a ratchet wheel device which prevents elongation of the safety belt when actuated in a selected position between a retracted position and an extended position of the safety belt; A safety belt retractor comprising means for activating the belt at the selected extended position of the belt. (2) The means for rotatably attaching the heald storage spool shaft includes a left end portion of the belt storage spool shaft having a smaller diameter than the intermediate portion and the right end portion of the belt storage spool shaft; is provided with a left shoulder portion between the left end portion and the intermediate portion so as to be in contact with the inner surface of the left side wall within the winding device frame, and the winding device further moves the storage spool shaft to the winding device frame. retaining spring means attachable to the heald storage spool shaft near the inner surface of the right side wall when the belt storage spool shaft is rotated; Claim 1, characterized in that the left shoulder portion of the storage spool shaft is held.
Safety belt retracting device as described in section. (3) The means for attaching the belt friction protection disc to the heald storage spool shaft has an annular collar integrated with the bell 1 friction protection disc, and the collar is the belt described in 1. Claim 1, characterized in that the collar surrounds an opening for receiving a belt storage spool shaft provided in a friction protection disc, and is press-fitted onto the belt storage spool shaft. safety heald retraction device. (4) The ratchet wheel device includes a ratchet wheel, a means for attaching the ratchet wheel to the right end of the heald storage spool shaft, and a ratchet wheel and a ratchet wheel that are attached to the winding device frame. A lock bar movable between a mating position and a non-engaging position, wherein the lock bar prevents the safety belt from extending in the mating position with the pawl wheel. A safety belt winding device according to claim 1. (5) the actuating means is a release disc rotatably attached to the heald storage spool shaft, and a release cam is provided on the radially outer surface of the release disc;
and means for deflecting the release cam to engage the lock bar during the unrolling of the safety belt', thereby preventing the lock bar from moving to a position in which the lock wheel is not engaged; and a means for engaging the safety belt. means for deflecting said release cam out of engagement with said lock bar so as to move said lock bar into a position in which said lock bar engages a ratchet wheel; Claim comprising a belt sensor device for moving said locking bar to a position in which the first index mark Mi is not engaged when approaching the position, thereby separating said locking bar from said ratchet wheel. The safety heald retraction device according to item 4. (6) The heald storage spool shaft has a longitudinally elongated hole extending from the left 0g1 portion of the belt storage spool shaft to the right end of the heald storage spool shaft, and the heald storage spool shaft further has the elongated hole. a support plate insertable into the hole; - the support plate has a left side and a right side and is of sufficient length such that the left side and right side of the support plate are connected to the right and right sides; The safety bell 1--retracting device according to claim 4, characterized in that the safety bell 1-retracting device passes through the opening provided in the side wall of the left retracting device frame. (7) The means for taking the ratchet wheel onto the heald I/storage spool shaft is located on the support plate at - and protrudes radially outward from the heald storage spool shaft. 7. The safety belt retracting device according to claim 6, characterized in that the tab includes an eye portion and is fixedly engaged with an elongated fitting hole provided in the car. (8) - means for attaching said safety belt to said heald storage spool shaft, the surface of said safety belt defining a cross passage on said belt storage spool shaft of sufficient size for passage of said safety belt; A ring at one end, and a sturdy belt rod that can be inserted into the ring, and if the heald rod is of sufficient size, the ring and the inserted heald rod are attached to the bell I/storage spool shaft. 2. The safety belt retracting device according to claim 1, further comprising a device for preventing the safety belt from passing through the cross passage, thereby attaching the safety belt to the belt storage spool shaft. (9) The belt storage spool shaft has a longitudinally elongated hole extending from the left end of the belt storage spool shaft to the right end of the belt storage spool shaft, and the belt storage spool shaft is inserted into the elongated hole. wherein the support plate is also provided with a cross passage through which the safety bell 1- can pass, and the cross passage provided in the support plate is smaller than the cross passage passing through the heald storage spool shaft. ,
The above-mentioned sturdy heald rod allows the loop of the safety belt and the inserted sturdy belt rod to pass through the cross passage of the heald storage spool shaft, but cannot pass through the cross passage of the support plate. A safety heald retraction device according to claim 8, characterized in that: 00) The means for attaching the ratchet wheel to the bell I/storage spool shaft is a mounting disc fixed to the heald storage spool shaft and extending in the radial direction, and the mounting disc is connected to the mounting circle. one or more tabs extending laterally from the plate, and a plane defining an elongated hole in the ratchet wheel for mating with the tab, the common rotation of the ratchet wheel and the belt storage spool shaft; 5. A safety heald retraction device according to claim 4, characterized in that it comprises a device that provides only a safety heald.